Inclosed resistance.



PATENTED NOV. 26, 1907.

H. J. WIEGAND.

INGLOSED RESISTANCE.

APPLICATION FILED 00'1. 30.1905.

2 SHEBTSSHEE T 2.

UNITED STATES PATENT OFFICE.

HENRY J. WIEGAND, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLER-HAMMERMANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS-CONSIN.

IN CLOSED RESISTANCE Specification of Letters Patent.

Patented Nov. 26, 1907.

To all whom it may concern;

Be it known that I, HENRY J. VVIEGAND, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofl/Visconsin, have invented new and useful Improvements in InclosedResistances, of which the following is a full, clear, concise, and exactdescription, reference being had to the accompanying drawing, forming apart of this specification.

My invention relates to improvements in inclosed resistances.

In order to mount an inclosed resistance in position where it isinclosed within a metallic casing, it has been the practice to attachthe casing directly to a support. It is objectionable to mount theresistance in this way, due to the fact that if the insulation betweenthe resistance and the casing be defective, leakage may take placethrough the easing to the support.

It is the object of my invention to provide a structure wherein thecasing will be insulated from the support, and accordingly I preferablymount the casing upon an insulating supporting member which is adaptedtobe attached to the sup ort. I

The other objects 0 my invention will be apparent from the disclosurethereof, which is hereinafter made.

It will, of course, be understood that the various features of myinvention may be applied to structures of different forms and that theparts thereof may be constructed in various ways.

For the purpose of illustrating my invention, I shall show and describea resistance unit which has been worked out in practice to embody thefeatures of my invention.

The several views in the accompanying drawing are as follows:

Figure 1 is a perspective View of the resistance unit. Fig. 2 is alongitudinal sectional view thereof. Fig. 3 is a cross sectional viewonthe line 33 of Fig. 2, and Fig. 4 is an elevation of a plurality ofresistance units mounted upon a supporting frame.

The resistance 1 is preferably wound upon an insulating supporting baseormember 2,

which may be composed of any suitable material. The base may berectangular in form, as shown in the drawing, and it is preferablyprovided with holes 3 through which bolts may be passed to attach it toa support.

' place.

The resistance is preferably provided with leads or terminals 4 whichare attached thereto by means; of rivets 5. The resistance and the leadsare preferably fastened to the base by means of pins 5*.

The resistance and the base are preferably surrounded by a casing 6,which may be of any suitableform. The casing shown in the drawing isrectangular in form, and it is preferably constructed from asingle-piece of sheet metal. The'sides and bottom of the casing are bentinwardly at the ends thereof to engage the base 2, thereby closing theends of the casing and also placing the casing at such a position uponthe base that a space is provided between the [same and the resistance.The sides of the casing are preferably fastened to each other at the topby means of a clamping strip 7, extending from one side and bent overthe other side, it being firmly held in place by means of a bent lug 8,which extends from the latter side and preferably passes through arecess 9.

Along the top of the casing'extends an insulating strip or block 10,over which the upper edges of the sides are bent to hold it in The stripis provided with slots 11 through which the leads 4 extend, and saidleads are insulated from the casing by said stri' It will, of course, beunderstood that the base 2 and the casing 6 may be of various forms, andthat the same may be associated with each other in different Ways.

' The casing is preferably filledwith a filler 12 which is adapted toinsulate the resistance from the casing. The casing is preferablyprovided with an aperture 13 through which the filler may be inserted.The filler maybe composed of any suitable material, but it is preferablymade of a cement which will set when it hardens, thereby practicallyuniting the casing, the base and the resistance, so as to form anintegral structure. This feature of my invention is fully set forth andclaimed In order to support the resistance unit, I

preferably attach the insulating supporting member to a support.Inasmuch as the casing is carried by the su porting member, the samewill be insulated om the support, and in consequence, leakage cannottake place through the casing. Of course, it will be understood that theresistance unit may be attached to the support in any way, so long asthe supporting member insulates the easing from the support. Another wayin which the resistance unit may be mounted upon a support, soas to havethe casing insulated from the support by means of the units carried bythe frame are shown in the drawing as electrically connected in series.

Where the resistance units are connected in this way, the strain uponthe insulating filler 12 of each unit is very small, by reason of thefact that the casing of each unit is in-" sulated from the supportingframe.

Where the resistance units are used in a rheostat, the leads thereof maybe connected .to the switch contact in any suitable way.

It will, of course, be understood that my invention is applicable tovarious pur oses, and

that certain features thereof may e applied to heating coils forelectric heaters and other devices.

' It is manifest that my invention may be embodied in different types ofinclosed resistances, and furthermore, that the structure which Ihaveparticularly set forth herein toexplain my invention, may be changedin various ways without eliminating the advantageous results which itattains.

Having thus described my invention what I claim as new, and desire tosecure by Letters Patent,is,-

1. An inclosed resistance comprising a resistance, a casing therefor,and an insulating supporting member having said casing car.- riedthereby. i

2. An inclosed resistance comprising a resistance, a casing therefor,and an insulating supporting member, all combined into a unitarystructure, said members being adapted to insulate said casing from thesupport for said structure.

3. An inclosed resistance comprising a resistance, a casing therefor,and an insulating supporting member having said casing carried therebyand adapted to be attachedto a support, all combined into a unitarystructure, said casing being so mounted upon said member as to beinsulated thereby from said support.

4. An inclosed resistance comprising an insulating supporting baseadapted to be at tached to a suitable support, a resistance wound uponsaid base, a casing surrounding said resistance and carried by said baseso as to be insulated thereby from said support.

5. An inclosedfresistance comprising a supporting member, a resistancecarried by said member, and a casing surrounding said resistanceandcarried by said member, said casing being filled with an insulatingfiller.

6. An inclosed resistance comprising an insulating supporting member, aresistance carried thereby, a casing inclosing said resistance andcarried by said supporting member, and a solid insulating fillercontained within said casing, all combined to make saidcasing, said baseand said resistance practically an integral structure.

7. An inclosed resistance comprising an insulating supporting baseadapted to be attached to a support, a resistance wound upon said base,a casing surrounding said resistance and carried by said'base, saidcasing being arranged upon said supporting member so as to be insulatedthereby from said support and an insulating filler contained within saidcasing.

8. An inclosed resistance comprising aninsulating supporting base, aresistance wound thereon, a casing surrounding said resistance andcarried by said base, said casing being so arranged upon said base as tobe insulated thereby from said support, and a solid insulating fillercontained within said casing. thereby making said casing, said base andsaid resistance practically an integral structure.

9. In inclosed resistance comprising an insulating base adapted to beattached to a support, a resistance wound upon said base,

a casing surrounding said resistance and carried by said base, saidcasing being so arranged upon said base as to be insulated thereby fromsaid support, leads connected to said resistance and a solid insulatingfiller contained within said casing, thereby making said casing, saidbase and said resistance practically an integral structure.

10. An inclosed resistance comprising a substantially rectangular base,adapted to be attached to a support, a resistance wound upon said baseand a substantially rectangular casing surrounding said resistance, saidcasing being filled with an insulating filler.

11. An inclosed resistance comprising a resistance, a casing surroundingsaid resistance and formed from a single piece of metal, parts of saidcasing being fastened together by means of clamping strips 7 and 8.

12. An inclosed resistance comprising a resistance, a casing surroundingsaid resistance, an insulating strip 10 and terminals extending throughsaid strip and connected to said resistance, said leadsbeing insulatedfrom said casing by said strip.

13. An inclosed resistance comprislng a base, a resistance carried bysaidbase, a cas ing surrounding said resistance and formed from a singlepiece of metal, parts of said cas ing being bent to engage said base soas to hold said casing in such a position upon said base as to provide aspace between said re sistance and said casing.

14. -An inclosed resistance comprising a base, a resistance carriedthereby, a casing surrounding said resistance and formed from a singlepiece of metal, a strip 10 andleads extending through said strip andconnected to said resistance, said leads being insulated from saidcasing by said strip.

15. An inclosed resistance comprising an insulating base, a resistancecarried thereby a casing surrounding said resistance, parts of saidcasing being bent to engage said base so as to hold said casing uponsaid base in such a position as to provide a spacebetween saidresistance and said casing, and an insulating filler arranged withinsaid space to insulate said resistance from said casing.

16. An inclosed resistance comprising an insulating base adapted to beattached to a support, a resistance carried by, said base, a casingsurrounding said resistance and formed from a single piece of metal,said casing being so arranged upon said base as to be insulated therebyfrom said support and parts of said casing being bent to close the endsthereof and also to engage said base so as to hold said casing in such aposition upon said base as to provide a space between said resistanceand said casing, an insulating filler arranged within said space, astrip 10 arranged within said casing and leads extending through saidstrip and connected to said resistance, said leads being insulated fromsaid casing by' casing being so arranged upon said base as to beinsulated thereby from said support and parts of said casing being bentto close the ends of said casing and also to engage said base so as tohold said casing in such a position upon said base as to leave a spacebetween said resistance and said casing, an insulating filler arrangedwithin said space, a strip 10 arranged within said casing, and leadsextending through said strip and connected to said resistance, saidleads being insulated from said casing by said strip.

18. An inclosed resistance comprising a substantially rectangularinsulating supporting base adapted to be attached to a suitable support,a resistance wound upon said base, a substantially rectangular casingsurrounding said resistance and formed from a single piece of metal,said casing being so arranged upon said base as to be insulated therebyfrom said support and the sides and bottom of said casing being bent toclose the ends of said casing and also to engage said base so as to holdsaid casing in such a position upon said base as to leave a spacebetween said resistance and said casing, clamping strips 7 and 8 bent tofasten said sides to each other, a strip 10 arranged within the spacebetween said casing and said resistance, and leads attached to saidresistance and extending through passages in said strip, said leadsbeing insulated from said casing by said strip.

19. An inclosed resistance comprising a casing, a resistance arrangedwithin said cas ing and an insulating member adapted to insulate saidcasing froma support, all combined into a unitary structure.

20. An inclosed resistance comprising a casing, a resistance inclosedWithin said casing, and an insulating supporting base or member havingsaid casing carried thereby and adapted to be attached to a support,said base being adapted to insulate said casing from said support.

21. An inclosed resistance comprising a casing, a resistance arrangedWithin said cas ing and surrounded by an insulating filler, and aninsulating supporting base or member having. said casing carried therebyand adapted to be attached to a support, said casing being insulatedfrom said support by said base. I

In witness whereof, I have hereunto subscribed my name in the presenceof twowitnesses.

HENRY J. WIEGANDQ Witnesses A. H. BARNICKEL, J. F. HAwKINs.

